So I'm just about ready to legally change my name after getting married last month. I know you need a few copies of either your "marriage license" or your "marriage certificate" for bringing to the Social Security office and the DMV and possibly some other places ... what is the difference between these two things if any and where/how do I get them? I'm so lost because all the websites seem to say different things. Is it worth using one of those name change services that is sometimes advertised on theknot and other wedding sites?